US5101092A - Method for reducing the generation of noise during arc welding - Google Patents

Method for reducing the generation of noise during arc welding Download PDF

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Publication number
US5101092A
US5101092A US07/660,624 US66062491A US5101092A US 5101092 A US5101092 A US 5101092A US 66062491 A US66062491 A US 66062491A US 5101092 A US5101092 A US 5101092A
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US
United States
Prior art keywords
current
accordance
welding
polarization change
clock signal
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Expired - Fee Related
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US07/660,624
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English (en)
Inventor
Klaus Baurle
Florian Maciaszczyk
Wolfgang Schuster
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Rehm Schweisstechnik GmbH and Co KG
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Rehm Schweisstechnik GmbH and Co KG
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Assigned to REHM SCHWEISSTECHNIK GMBH U. CO. reassignment REHM SCHWEISSTECHNIK GMBH U. CO. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: BAURLE, KLAUS, MACIASZCZYK, FLORIAN, SCHUSTER, WOLFGANG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/10—Other electric circuits therefor; Protective circuits; Remote controls

Definitions

  • This invention relates to a method for reducing the generation of noise during arc welding by means of alternating current with welding machines with clocked current sources
  • noise level generated by ac-welding machines constitutes an essential environmental factor for people who must work every day with or next to them.
  • This object is attained in accordance with this invention where the set value of the current is multiplied by a value which changes with time and which, starting with the polarization change request, first decreases the set value for the output polarity in accordance with a non-linear function and, following polarization change, allows it to increase again in a symmetrical manner to the original value.
  • This value which changes with time is generated using a digital-analog converter and a digital drive logic.
  • the drive logic is designed such that a bit pattern generator can be driven by a clock signal and generate fixed bit patterns to a digital-analog converter.
  • the clock signal can be slowed or suppressed if the actual current is unable to follow the set current.
  • the clock signal can be changed as a function of the polarization change frequency.
  • FIG. 1 shows the method in accordance with one embodiment of this invention in cooperation with other functional units of a welding machine
  • FIG. 2 shows a design of the drive logic
  • FIG. 3 shows possible time flows of relevant signals.
  • FIG. 1 shows one embodiment of the method of this invention in conjunction with an exemplary TIG-welding machine
  • the desired maximum output current is set by the operator, for example, with a potentiometer 6, 7.
  • a subsequent function generator 1 thus generates the functional sequences typical for TIG welding, with ramps at the beginning and end and, if required, with a pulse function.
  • a diagram in the oval field shows one possible shape of the generated current set value. Normally, this set value is supplied directly to the current regulator 2, which then drives the power end stage 3 Usually an alternating frequency generator 4 is present and is connected to two potentiometers. The frequency can be set on the first potentiometer 6 and the balance or symmetry on the second potentiometer 7. The alternating frequency generator 4 supplies the polarization change request for the end stage 3 where the polarity of the output current is reversed. In accordance with one embodiment of this invention, there are additional functional groups which are connected to each other as shown in FIG. 1.
  • the output of the alternating frequency generator 4--identified in FIG. 1 as polarization change request does not directly lead to the end stage 3, but rather is supplied to a drive logic 5.
  • the drive logic 5 then generates a bit pattern sequence which is supplied to a digital-analog converter.
  • the analog output value of the d/a converter is now multiplied in a known manner with the set value derived from the function generator 1. This results in the multiplied set value which is supplied directly or indirectly to the current regulator 2.
  • the generated bit pattern sequence is such that, over the course of time, first the set value is decreased in accordance with a non-linear function and, after polarization change, again grows to its initial value in a symmetrical manner.
  • the non-linear function may have, for example, the flow of the cosine, or may also be arbitrarily optimized in accordance with other criteria, preferably those relating to reduction of noise
  • FIG. 1 Another signal--identified in FIG. 1 as polarization change command--is generated in the drive logic 5.
  • the bit pattern When the bit pattern generates a value corresponding to zero, that is, when the modified set value has become zero, the command for changing the output polarity is transmitted to the end stage 3
  • FIG. 2 shows a design of the drive logic in accordance with one embodiment of this invention.
  • One possible input to the bit pattern generator is a read-out pulse which triggers an address counter connected to a memory module.
  • the desired bit pattern sequence is then generated at its output with correct programming of the memory module. It is obvious that it is also possible to generate the desired bit pattern sequence with known means of processor technology.
  • the clock rate of the bit pattern generator is a function of the polarization change frequency.
  • the read-out of the bit pattern sequence would be slower than with high frequencies.
  • the basic flow of the welding current is always the same, so that fixed relationships between peak currents, middle currents and effective currents are created.
  • FIG. 3 shows possible signal flows of the relevant signals in accordance with this invention.
  • These are the polarization change request and the current set value, which, for the cases shown, has been considered to be constant for the time interval considered.
  • the bit pattern generator starts outputting its sequence when the flank of the polarization change request changes, and a value, which changes with time, can appear downstream of the d/a converter, as shown.
  • the modified set value is generated following multiplication of this value with the set value.
  • the amount of the current set value is decreased during the time t1 until it reaches zero. At this point in time the polarization change command is issued.
  • the current set value increases during the time t2 in a symmetrical manner back to the original value, but with reversed polarity.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Arc Welding Control (AREA)
US07/660,624 1990-02-28 1991-02-25 Method for reducing the generation of noise during arc welding Expired - Fee Related US5101092A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4006203 1990-02-28
DE4006203A DE4006203C1 (enrdf_load_stackoverflow) 1990-02-28 1990-02-28

Publications (1)

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US5101092A true US5101092A (en) 1992-03-31

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US07/660,624 Expired - Fee Related US5101092A (en) 1990-02-28 1991-02-25 Method for reducing the generation of noise during arc welding

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US (1) US5101092A (enrdf_load_stackoverflow)
DE (1) DE4006203C1 (enrdf_load_stackoverflow)
FI (1) FI910963A7 (enrdf_load_stackoverflow)
SE (1) SE9100536L (enrdf_load_stackoverflow)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6326591B1 (en) 1998-02-17 2001-12-04 Illinois Tool Works Inc. Method and apparatus for short arc welding
WO2018004338A1 (en) 2016-06-27 2018-01-04 Tagworks Pharmaceuticals B.V. Cleavable tetrazine used in bio-orthogonal drug activation
WO2019212357A1 (en) 2018-05-04 2019-11-07 Tagworks Pharmaceuticals B.V. Compounds comprising a linker for increasing transcyclooctene stability
WO2019212356A1 (en) 2018-05-04 2019-11-07 Tagworks Pharmaceuticals B .V. Tetrazines for high click conjugation yield in vivo and high click release yield
WO2020256546A1 (en) 2019-06-17 2020-12-24 Tagworks Pharmaceuticals B.V. Compounds for fast and efficient click release
WO2020256544A1 (en) 2019-06-17 2020-12-24 Tagworks Pharmaceuticals B.V. Tetrazines for high click release speed and yield
WO2023031445A2 (en) 2021-09-06 2023-03-09 Veraxa Biotech Gmbh Novel aminoacyl-trna synthetase variants for genetic code expansion in eukaryotes
EP4186529A1 (en) 2021-11-25 2023-05-31 Veraxa Biotech GmbH Improved antibody-payload conjugates (apcs) prepared by site-specific conjugation utilizing genetic code expansion
WO2023094525A1 (en) 2021-11-25 2023-06-01 Veraxa Biotech Gmbh Improved antibody-payload conjugates (apcs) prepared by site-specific conjugation utilizing genetic code expansion
WO2023104941A1 (en) 2021-12-08 2023-06-15 European Molecular Biology Laboratory Hydrophilic tetrazine-functionalized payloads for preparation of targeting conjugates
WO2023158305A1 (en) 2022-02-15 2023-08-24 Tagworks Pharmaceuticals B.V. Masked il12 protein
WO2024080872A1 (en) 2022-10-12 2024-04-18 Tagworks Pharmaceuticals B.V. Strained bicyclononenes
WO2024153789A1 (en) 2023-01-20 2024-07-25 Basf Se Stabilized biopolymer composition, their manufacture and use
WO2024191293A1 (en) 2023-03-10 2024-09-19 Tagworks Pharmaceuticals B.V. Trans-cyclooctene with improved t-linker
WO2025021929A1 (en) 2023-07-27 2025-01-30 Veraxa Biotech Gmbh Hydrophilic trans-cyclooctene (hytco) compounds, constructs and conjugates containing the same
WO2025056807A1 (en) 2023-09-15 2025-03-20 Basf Se Stabilized biopolymer composition, their manufacture and use
WO2025174248A1 (en) 2024-02-16 2025-08-21 Tagworks Pharmaceuticals B.V. Trans-cyclooctenes with "or gate" release

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4038515A (en) * 1975-05-08 1977-07-26 Miller Electric Manufacturing Company Asymmetrical a.c. welder
US4371776A (en) * 1981-06-26 1983-02-01 Union Carbide Corporation Welding power supply
JPS62176679A (ja) * 1986-01-30 1987-08-03 Hitachi Seiko Ltd ア−ク溶接用電源
DE3816238A1 (de) * 1987-05-12 1988-12-01 Kobe Steel Ltd Stromversorgungssystem zur abschmelzelektroden-lichtbogenschweissung und verfahren zum steuern desselben
US4876433A (en) * 1988-06-29 1989-10-24 Hitachi Seiko, Ltd. Inverter controlled-type power source for arc welding

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4038515A (en) * 1975-05-08 1977-07-26 Miller Electric Manufacturing Company Asymmetrical a.c. welder
US4371776A (en) * 1981-06-26 1983-02-01 Union Carbide Corporation Welding power supply
JPS62176679A (ja) * 1986-01-30 1987-08-03 Hitachi Seiko Ltd ア−ク溶接用電源
DE3816238A1 (de) * 1987-05-12 1988-12-01 Kobe Steel Ltd Stromversorgungssystem zur abschmelzelektroden-lichtbogenschweissung und verfahren zum steuern desselben
US4876433A (en) * 1988-06-29 1989-10-24 Hitachi Seiko, Ltd. Inverter controlled-type power source for arc welding

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6326591B1 (en) 1998-02-17 2001-12-04 Illinois Tool Works Inc. Method and apparatus for short arc welding
US6653595B2 (en) 1998-02-17 2003-11-25 Illinois Tool Works Inc. Method and apparatus for welding with output stabilizer
US6800832B2 (en) 1998-02-17 2004-10-05 Illinois Tool Works Inc. Method and apparatus for welding
US20040238513A1 (en) * 1998-02-17 2004-12-02 Illinois Tool Works Inc. Method and apparatus for welding
US6987243B2 (en) 1998-02-17 2006-01-17 Illinois Tool Works Inc. Method and apparatus for welding
US20080006616A1 (en) * 1998-02-17 2008-01-10 Illinois Tool Works Inc. Method And Apparatus For Short Arc Welding
US7598474B2 (en) 1998-02-17 2009-10-06 Illinois Tool Works Inc. Method and apparatus for short arc welding
US20100006552A1 (en) * 1998-02-17 2010-01-14 Illinois Tool Works Inc. Method And Apparatus For Short Arc Welding
WO2018004338A1 (en) 2016-06-27 2018-01-04 Tagworks Pharmaceuticals B.V. Cleavable tetrazine used in bio-orthogonal drug activation
WO2019212357A1 (en) 2018-05-04 2019-11-07 Tagworks Pharmaceuticals B.V. Compounds comprising a linker for increasing transcyclooctene stability
WO2019212356A1 (en) 2018-05-04 2019-11-07 Tagworks Pharmaceuticals B .V. Tetrazines for high click conjugation yield in vivo and high click release yield
EP4382167A2 (en) 2018-05-04 2024-06-12 Tagworks Pharmaceuticals B.V. Compounds comprising a linker for increasing transcyclooctene stability
WO2020256544A1 (en) 2019-06-17 2020-12-24 Tagworks Pharmaceuticals B.V. Tetrazines for high click release speed and yield
EP4382129A2 (en) 2019-06-17 2024-06-12 Tagworks Pharmaceuticals B.V. Compounds for fast and efficient click release
WO2020256546A1 (en) 2019-06-17 2020-12-24 Tagworks Pharmaceuticals B.V. Compounds for fast and efficient click release
WO2023031445A2 (en) 2021-09-06 2023-03-09 Veraxa Biotech Gmbh Novel aminoacyl-trna synthetase variants for genetic code expansion in eukaryotes
EP4186529A1 (en) 2021-11-25 2023-05-31 Veraxa Biotech GmbH Improved antibody-payload conjugates (apcs) prepared by site-specific conjugation utilizing genetic code expansion
WO2023094525A1 (en) 2021-11-25 2023-06-01 Veraxa Biotech Gmbh Improved antibody-payload conjugates (apcs) prepared by site-specific conjugation utilizing genetic code expansion
WO2023104941A1 (en) 2021-12-08 2023-06-15 European Molecular Biology Laboratory Hydrophilic tetrazine-functionalized payloads for preparation of targeting conjugates
EP4372000A2 (en) 2022-02-15 2024-05-22 Tagworks Pharmaceuticals B.V. Masked il12 protein
WO2023158305A1 (en) 2022-02-15 2023-08-24 Tagworks Pharmaceuticals B.V. Masked il12 protein
WO2024080872A1 (en) 2022-10-12 2024-04-18 Tagworks Pharmaceuticals B.V. Strained bicyclononenes
WO2024153789A1 (en) 2023-01-20 2024-07-25 Basf Se Stabilized biopolymer composition, their manufacture and use
WO2024191293A1 (en) 2023-03-10 2024-09-19 Tagworks Pharmaceuticals B.V. Trans-cyclooctene with improved t-linker
WO2025021929A1 (en) 2023-07-27 2025-01-30 Veraxa Biotech Gmbh Hydrophilic trans-cyclooctene (hytco) compounds, constructs and conjugates containing the same
WO2025056807A1 (en) 2023-09-15 2025-03-20 Basf Se Stabilized biopolymer composition, their manufacture and use
WO2025174248A1 (en) 2024-02-16 2025-08-21 Tagworks Pharmaceuticals B.V. Trans-cyclooctenes with "or gate" release

Also Published As

Publication number Publication date
SE9100536L (sv) 1991-08-29
FI910963A0 (fi) 1991-02-27
DE4006203C1 (enrdf_load_stackoverflow) 1991-05-02
FI910963A7 (fi) 1991-08-29
SE9100536D0 (sv) 1991-02-25

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